So, after around 30 min of waiting time, the agent told that it very normal to not receive the AOR because the processing of each application is different even the applications are grouped in the one packageDo share if your issue gets resolved. Many people face this issue of not receiving AOR email.
He tried first to check if my application is on the system, however, he couldn't find it
Then, he asked me to remain on hold until he tries another thing. I waited for around 3 min, then he came back saying that he found that my profile/application is under construction and assigned with a temporary number. He explained that this means that they are working on the application and that I should expect an AOR or a request of more documents
So, at least, now I know that they are working on the applications and that they aren't misplaced
Hope to hear from them soon
I will keep you all updated
Thanks again @forw.jane for the suggestion and hope @splashyygirl find my response useful